{
  "schemaVersion": 1,
  "attribution": [
    {
      "source": "CISA Known Exploited Vulnerabilities",
      "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog",
      "licence": "US government work"
    },
    {
      "source": "GitHub Advisory Database",
      "url": "https://github.com/advisories",
      "licence": "CC BY 4.0"
    },
    {
      "source": "Have I Been Pwned",
      "url": "https://haveibeenpwned.com/",
      "licence": "CC BY 4.0"
    },
    {
      "source": "CVE Program (CVE records)",
      "url": "https://www.cve.org/Legal/TermsOfUse",
      "licence": "CVE Terms of Use",
      "notice": "Copyright © 1999-2026, The MITRE Corporation. CVE is a trademark and the CVE logo is a registered trademark of The MITRE Corporation.",
      "terms": "CVE Usage: MITRE hereby grants you a perpetual, worldwide, non-exclusive, no-charge, royalty-free, irrevocable copyright license to reproduce, prepare derivative works of, publicly display, publicly perform, sublicense, and distribute Common Vulnerabilities and Exposures (CVE™). Any copy you make for such purposes is authorized provided that you reproduce MITRE's copyright designation and this license in any such copy."
    },
    {
      "source": "FIRST EPSS",
      "url": "https://www.first.org/epss/",
      "licence": "free to use; FIRST requests attribution"
    }
  ],
  "record": {
    "id": "CVE-2021-47006",
    "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2021-47006",
    "idYear": 2021,
    "status": "PUBLISHED",
    "publishedAt": "2024-02-28T08:13:26.541Z",
    "updatedAt": "2026-05-11T13:46:08.152Z",
    "importedAt": "2026-10-24T01:56:36.661Z",
    "snapshot": {
      "id": "cve_2026-10-24_midnight_baseline",
      "at": "2026-10-24T00:00:00.000Z",
      "source": "https://github.com/CVEProject/cvelistV5/releases/tag/cve_2026-10-24_0100Z"
    },
    "facts": {
      "title": "ARM: 9064/1: hw_breakpoint: Do not directly check the event's overflow_handler hook",
      "summary": "In the Linux kernel, the following vulnerability has been resolved:\n\nARM: 9064/1: hw_breakpoint: Do not directly check the event's overflow_handler hook\n\nThe commit 1879445dfa7b (\"perf/core: Set event's default\n::overflow_handler()\") set a default event->overflow_handler in\nperf_event_alloc(), and replace the check event->overflow_handler with\nis_default_overflow_handler(), but one is missing.\n\nCurrently, the bp->overflow_handler can not be NULL. As a result,\nenable_single_step() is always not invoked.\n\nComments from Zhen Lei:\n\n https://patchwork.kernel.org/project/linux-arm-kernel/patch/20210207105934.2001-1-thunder.leizhen@huawei.com/",
      "affected": [
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "unaffected",
          "versions": [
            {
              "version": "1879445dfa7bbd6fe21b09c5cc72f4934798afed",
              "status": "affected",
              "versionType": "git",
              "lessThan": "555a70f7fff03bd669123487905c47ae27dbdaac"
            },
            {
              "version": "1879445dfa7bbd6fe21b09c5cc72f4934798afed",
              "status": "affected",
              "versionType": "git",
              "lessThan": "ed1f67465327cec4457bb988775245b199da86e6"
            },
            {
              "version": "1879445dfa7bbd6fe21b09c5cc72f4934798afed",
              "status": "affected",
              "versionType": "git",
              "lessThan": "a9938d6d78a238d6ab8de57a4d3dcf77adceb9bb"
            },
            {
              "version": "1879445dfa7bbd6fe21b09c5cc72f4934798afed",
              "status": "affected",
              "versionType": "git",
              "lessThan": "3ed8832aeaa9a37b0fc386bb72ff604352567c80"
            },
            {
              "version": "1879445dfa7bbd6fe21b09c5cc72f4934798afed",
              "status": "affected",
              "versionType": "git",
              "lessThan": "630146203108bf6b8934eec0dfdb3e46dcb917de"
            },
            {
              "version": "1879445dfa7bbd6fe21b09c5cc72f4934798afed",
              "status": "affected",
              "versionType": "git",
              "lessThan": "7eeacc6728c5478e3c01bc82a1f08958eaa12366"
            },
            {
              "version": "1879445dfa7bbd6fe21b09c5cc72f4934798afed",
              "status": "affected",
              "versionType": "git",
              "lessThan": "dabe299425b1a53a69461fed7ac8922ea6733a25"
            },
            {
              "version": "1879445dfa7bbd6fe21b09c5cc72f4934798afed",
              "status": "affected",
              "versionType": "git",
              "lessThan": "a506bd5756290821a4314f502b4bafc2afcf5260"
            }
          ]
        },
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "affected",
          "versions": [
            {
              "version": "4.7",
              "status": "affected"
            },
            {
              "version": "0",
              "status": "unaffected",
              "versionType": "semver",
              "lessThan": "4.7"
            },
            {
              "version": "4.9.269",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "4.9.*"
            },
            {
              "version": "4.14.233",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "4.14.*"
            },
            {
              "version": "4.19.191",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "4.19.*"
            },
            {
              "version": "5.4.120",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "5.4.*"
            },
            {
              "version": "5.10.38",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "5.10.*"
            },
            {
              "version": "5.11.22",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "5.11.*"
            },
            {
              "version": "5.12.5",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "5.12.*"
            },
            {
              "version": "5.13",
              "status": "unaffected",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ]
        }
      ]
    }
  }
}